Description
CFNext before 3.1.0 contains a weak cryptographic derivation vulnerability that allows subscription link holders to recover the admin password because the subscription UUID is an MD5 of the password with a fixed public salt. Attackers can brute-force the password offline without rate limiting, log into the admin panel, and read stored Trojan, Clash, Telegram and Cloudflare API secrets.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| PAICNI | CFNext | < 3.1.0 | 3.1.0 |
References
- GitHub Issue #57 issue-tracking
- https://github.com/PAICNI/CFNext product
- Fix commit patch
- https://github.com/PAICNI/CFNext/blob/1c7b3d8bed5b06a1449ea28302bb9a648f67e8e1/CFNext-%E6%98%8E%E6%96%87%E7%89%88.js#L12 technical-description
- https://github.com/PAICNI/CFNext/blob/1c7b3d8bed5b06a1449ea28302bb9a648f67e8e1/CFNext-%E6%98%8E%E6%96%87%E7%89%88.js#L2440 technical-description
- VulnCheck Advisory: CFNext before 3.1.0 Admin Password Recovery via MD5-Derived Subscription UUID third-party-advisory